feat: add alert at onGeolocationPermissionsShowPrompt

Author: gundomlegend

android/src/main/java/com/reactnativecommunity/webview/RNCWebChromeClient.java

@@ -228,7 +228,22 @@ public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermiss
             requestPermissions(Collections.singletonList(Manifest.permission.ACCESS_FINE_LOCATION));
 
         } else {
-            callback.invoke(origin, true, false);
+            String alertMessage = String.format("Allow %s to use your location?", origin);
+            AlertDialog.Builder builder = new AlertDialog.Builder(this.mWebView.getContext());
+            builder.setMessage(alertMessage);
+            builder.setCancelable(false);
+            builder.setPositiveButton("Allow", (dialog, which) -> {
+                callback.invoke(origin, true, false);
+            });
+            builder.setNegativeButton("Don't allow", (dialog, which) -> {
+                callback.invoke(origin, false, false);
+            });
+            AlertDialog alertDialog = builder.create();
+            alertDialog.show();
+            //Delay making `allow` clickable for 500ms to avoid unwanted presses.
+            Button posButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
+            posButton.setEnabled(false);
+            this.runDelayed(() -> posButton.setEnabled(true), 500);
         }
     }